<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html">
	<meta charset="utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
	<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	<title></title>
</head>
<body erke-hide>
</body>
<script>
/**
 * @param {number[]} nums
 * @return {number}
 */
var singleNumber = function(nums) {
	nums=nums.sort(aAronSb);
    for(var i=0;i<nums.length-1;i++){
		if(nums[i]==nums[i+1]){
			i++;
		}else{
			console.log(nums[i]);
			return nums[i];
		};
	};
	return nums[i];
};
function aAronSb(a,b) {
	return a - b;
};  
var aAronDie=new singleNumber([2,2,1]);
</script>
</html>
